I'm looking at getting a machine and am comparing the TechSew 5100, Cobra Class 4, and Cowboy CB4500. From the research I've done and everything I've read they're all similar machines with similar specifications. These machines might be more machine than I need, but I wanted a machine that can sew the real thick thread, and all of these sew up to 415 (i think the thick thread looks nice on a belt). There are times when it would be used for thinner leather to put a decorative stich on 1 layer of veg tanned leather, so I'm wondering how these big machines perform on thinner leather? I know Wiz wrote an article on "dumbing down" the machine which was helpful. Basically I'd like to get the big machine to handle the thick thread, but would be using it on thinner leather sometimes. Also, of the three machines, does anyone have a preference on which machine performs best? I've read that customer service from all companies are good. I'm in Wisconsin so the closest company would be Cowboy, but even that's a 10 hour drive so I would most likely do shipping either way.